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<h1>webserver.c</h1><a href="webserver_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*********************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> Copyright 2006 MakingThings</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Licensed under the Apache License, </span>
<a name="l00006"></a>00006 <span class="comment"> Version 2.0 (the "License"); you may not use this file except in compliance </span>
<a name="l00007"></a>00007 <span class="comment"> with the License. You may obtain a copy of the License at</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> http://www.apache.org/licenses/LICENSE-2.0 </span>
<a name="l00010"></a>00010 <span class="comment"> </span>
<a name="l00011"></a>00011 <span class="comment"> Unless required by applicable law or agreed to in writing, software distributed</span>
<a name="l00012"></a>00012 <span class="comment"> under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR</span>
<a name="l00013"></a>00013 <span class="comment"> CONDITIONS OF ANY KIND, either express or implied. See the License for</span>
<a name="l00014"></a>00014 <span class="comment"> the specific language governing permissions and limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment">*********************************************************************************/</span>
<a name="l00017"></a>00017 
<a name="l00018"></a>00018 <span class="comment"></span>
<a name="l00019"></a>00019 <span class="comment">/** \file webserver.c </span>
<a name="l00020"></a>00020 <span class="comment">  Functions for implementing a WebServer on the Make Controller Board.</span>
<a name="l00021"></a>00021 <span class="comment">*/</span>
<a name="l00022"></a>00022 
<a name="l00023"></a>00023 <span class="preprocessor">#include "config.h"</span> <span class="comment">// MakingThings.</span>
<a name="l00024"></a>00024 <span class="preprocessor">#ifdef MAKE_CTRL_NETWORK</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span>
<a name="l00026"></a>00026 <span class="comment">/* Standard includes. */</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00029"></a>00029 <span class="preprocessor">#include &lt;ctype.h&gt;</span>
<a name="l00030"></a>00030 
<a name="l00031"></a>00031 <span class="preprocessor">#include "network.h"</span>
<a name="l00032"></a>00032 
<a name="l00033"></a>00033 <span class="preprocessor">#define HANDLERS_MAX        5</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor">#define REQUEST_SIZE_MAX  256</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span><span class="preprocessor">#define RESPONSE_SIZE_MAX 1000</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">#define HTTP_OK "HTTP/1.0 200 OK\r\nContent-type: "</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#define HTTP_CONTENT_HTML "text/html\r\n\r\n"</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define HTTP_CONTENT_PLAIN "text/plain\r\n\r\n"</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor">#define HTTP_PORT   ( 80 )</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>
<a name="l00041"></a>00041 <span class="preprocessor">#define HTML_OS_START \</span>
<a name="l00042"></a>00042 <span class="preprocessor">"&lt;BR&gt;Make Magazine - MakingThings&lt;BR&gt;&lt;H1&gt;MAKE Controller Kit&lt;/H1&gt;Page Hits "</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span>
<a name="l00044"></a>00044 <span class="keywordtype">void</span> WebServerTask( <span class="keywordtype">void</span> *p );
<a name="l00045"></a>00045 
<a name="l00046"></a>00046 <span class="keyword">typedef</span> <span class="keyword">struct </span>WebServerHandlerS
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048   <span class="keywordtype">char</span>* address;
<a name="l00049"></a>00049   int (*handler)( <span class="keywordtype">char</span>* requestType, <span class="keywordtype">char</span>* address,  <span class="keywordtype">char</span>* requestBuffer, <span class="keywordtype">int</span> requestMaxSize, <span class="keywordtype">void</span>* socket, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">int</span> len ); 
<a name="l00050"></a>00050 } WebServerHandler;
<a name="l00051"></a>00051 
<a name="l00052"></a>00052 <span class="keyword">typedef</span> <span class="keyword">struct </span>WebServerHandlersS
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054   <span class="keywordtype">int</span> count;
<a name="l00055"></a>00055   WebServerHandler handlers[ HANDLERS_MAX ];
<a name="l00056"></a>00056 } WebServerHandlers_;
<a name="l00057"></a>00057 
<a name="l00058"></a>00058 WebServerHandlers_* WebServerHandlers = NULL;
<a name="l00059"></a>00059 
<a name="l00060"></a>00060 <span class="keyword">typedef</span> <span class="keyword">struct </span>WebServerS
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062   <span class="keywordtype">int</span> hits;
<a name="l00063"></a>00063   <span class="keywordtype">void</span>* serverTask;
<a name="l00064"></a>00064   <span class="keywordtype">void</span> *serverSocket;
<a name="l00065"></a>00065   <span class="keywordtype">void</span> *requestSocket;
<a name="l00066"></a>00066 
<a name="l00067"></a>00067   <span class="keywordtype">char</span> request[ REQUEST_SIZE_MAX ];
<a name="l00068"></a>00068   <span class="keywordtype">char</span> response[ RESPONSE_SIZE_MAX ];
<a name="l00069"></a>00069 } WebServer_;
<a name="l00070"></a>00070 
<a name="l00071"></a>00071 WebServer_* WebServer = NULL;
<a name="l00072"></a>00072 
<a name="l00073"></a>00073 <span class="preprocessor">#include "webserver.h"</span>
<a name="l00074"></a>00074 <span class="preprocessor">#include "analogin.h"</span>
<a name="l00075"></a>00075 <span class="preprocessor">#include "system.h"</span>
<a name="l00076"></a>00076 
<a name="l00077"></a>00077 <span class="preprocessor">#include "FreeRTOS.h"</span>
<a name="l00078"></a>00078 <span class="preprocessor">#include "task.h"</span>
<a name="l00079"></a>00079 
<a name="l00080"></a>00080 <span class="keywordtype">int</span> TestHandler( <span class="keywordtype">char</span>* requestType, <span class="keywordtype">char</span>* address, <span class="keywordtype">char</span>* requestBuffer, <span class="keywordtype">int</span> requestMaxSize, <span class="keywordtype">void</span>* socket, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">int</span> len );
<a name="l00081"></a>00081 
<a name="l00082"></a>00082 <span class="keyword">static</span> <span class="keywordtype">int</span> WebServer_WriteResponseOk_( <span class="keywordtype">char</span>* content, <span class="keywordtype">void</span>* socket );
<a name="l00083"></a>00083 
<a name="l00084"></a>00084 <span class="comment"></span>
<a name="l00085"></a>00085 <span class="comment">/** \defgroup webserver Web Server</span>
<a name="l00086"></a>00086 <span class="comment">  Very simple Web Server</span>
<a name="l00087"></a>00087 <span class="comment"></span>
<a name="l00088"></a>00088 <span class="comment">  This Web Server implementation is based on the ServerSocket and Socket functions defined</span>
<a name="l00089"></a>00089 <span class="comment">  in \ref Sockets.  When started (usually by the Network subsystem), a ServerSocket is opened</span>
<a name="l00090"></a>00090 <span class="comment">  and set to listen on port 80.</span>
<a name="l00091"></a>00091 <span class="comment"></span>
<a name="l00092"></a>00092 <span class="comment">  When the server receives a request, it checks the incoming address against a list of handlers.</span>
<a name="l00093"></a>00093 <span class="comment">  If the address matches, the handler is invoked and checking stops.  Users can add their own</span>
<a name="l00094"></a>00094 <span class="comment">  handlers to return custom information.  Handlers persist even when the server is deactivated.</span>
<a name="l00095"></a>00095 <span class="comment"></span>
<a name="l00096"></a>00096 <span class="comment">  There are two default handlers.  One is mounted at "/test" and will reply with the message "Test"</span>
<a name="l00097"></a>00097 <span class="comment">  and a current hit count.  This handler will only be mounted if no other handlers are present when</span>
<a name="l00098"></a>00098 <span class="comment">  the server is started up.  The other handler is a default handler which will match any address not </span>
<a name="l00099"></a>00099 <span class="comment">  already matched.  This is the standard information page showing free memory, running tasks, etc.  This</span>
<a name="l00100"></a>00100 <span class="comment">  page will reload every second from "/info".</span>
<a name="l00101"></a>00101 <span class="comment"></span>
<a name="l00102"></a>00102 <span class="comment">  \ingroup Controller</span>
<a name="l00103"></a>00103 <span class="comment">  @{</span>
<a name="l00104"></a>00104 <span class="comment">*/</span>
<a name="l00105"></a>00105 <span class="comment"></span>
<a name="l00106"></a>00106 <span class="comment">/**</span>
<a name="l00107"></a>00107 <span class="comment">  Set the active state of the WebServer subsystem.  This is automatically set to true</span>
<a name="l00108"></a>00108 <span class="comment">  by the Network Subsystem as it activates if the /network/webserver property is </span>
<a name="l00109"></a>00109 <span class="comment">  set to true.  If there are no specifed handlers at the time of initialization,</span>
<a name="l00110"></a>00110 <span class="comment">  the default test handler is installed.</span>
<a name="l00111"></a>00111 <span class="comment">  @param active An integer specifying the active state - 1 (on) or 0 (off).</span>
<a name="l00112"></a>00112 <span class="comment">  @return CONTROLLER_OK (0) on success or the appropriate error if not</span>
<a name="l00113"></a>00113 <span class="comment">*/</span>
<a name="l00114"></a><a class="code" href="group__webserver.html#g5a95d049647db95b76a70bc5f722719c">00114</a> <span class="keywordtype">int</span> <a class="code" href="group__webserver.html#g5a95d049647db95b76a70bc5f722719c" title="Set the active state of the WebServer subsystem.">WebServer_SetActive</a>( <span class="keywordtype">int</span> active )
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116   <span class="keywordflow">if</span> ( active )
<a name="l00117"></a>00117   {
<a name="l00118"></a>00118     <span class="keywordflow">if</span> ( WebServer == NULL )
<a name="l00119"></a>00119     {
<a name="l00120"></a>00120       WebServer = <a class="code" href="group___utils.html#g95923aa748602fa0330903fca05ca892" title="Same as Malloc, but keeps trying until it succeeds.">MallocWait</a>( <span class="keyword">sizeof</span>( WebServer_ ), 100 );    
<a name="l00121"></a>00121       WebServer-&gt;hits = 0;
<a name="l00122"></a>00122       WebServer-&gt;serverSocket = NULL;
<a name="l00123"></a>00123       WebServer-&gt;requestSocket = NULL;
<a name="l00124"></a>00124 <span class="preprocessor">      #ifdef CROSSWORKS_BUILD</span>
<a name="l00125"></a>00125 <span class="preprocessor"></span>      WebServer-&gt;serverTask = <a class="code" href="group___tasks.html#g784f87fb45eebb76d07478036ed228d3" title="Create a new task.">TaskCreate</a>( WebServerTask, <span class="stringliteral">"WebServ"</span>, 800, NULL, 4 );
<a name="l00126"></a>00126 <span class="preprocessor">      #else</span>
<a name="l00127"></a>00127 <span class="preprocessor"></span>      WebServer-&gt;serverTask = <a class="code" href="group___tasks.html#g784f87fb45eebb76d07478036ed228d3" title="Create a new task.">TaskCreate</a>( WebServerTask, <span class="stringliteral">"WebServ"</span>, 1800, NULL, 4 );
<a name="l00128"></a>00128 <span class="preprocessor">      #endif // CROSSWORKS_BUILD</span>
<a name="l00129"></a>00129 <span class="preprocessor"></span>      <span class="keywordflow">if</span> ( WebServer-&gt;serverTask == NULL )
<a name="l00130"></a>00130       {
<a name="l00131"></a>00131         <a class="code" href="group___utils.html#g6b0be54448d6ce393134400f4b22fa97" title="Free memory from the heap.">Free</a>( WebServer );
<a name="l00132"></a>00132         WebServer = NULL;
<a name="l00133"></a>00133         <span class="keywordflow">return</span> <a class="code" href="group___error.html#g8ab075cae3562308100cdea4dc66f4bb" title="Task did not start successfully.">CONTROLLER_ERROR_CANT_START_TASK</a>;
<a name="l00134"></a>00134       }
<a name="l00135"></a>00135   
<a name="l00136"></a>00136       <span class="comment">// Test the routing system</span>
<a name="l00137"></a>00137       <span class="keywordflow">if</span> ( WebServerHandlers == NULL )
<a name="l00138"></a>00138         <a class="code" href="group__webserver.html#g617645f84a704ca27ed9650270ee2d26" title="Adds a route handler to the WebServer.">WebServer_Route</a>( <span class="stringliteral">"/test"</span>, TestHandler );
<a name="l00139"></a>00139     }
<a name="l00140"></a>00140   }
<a name="l00141"></a>00141   <span class="keywordflow">else</span>
<a name="l00142"></a>00142   {
<a name="l00143"></a>00143     <span class="keywordflow">if</span>( WebServer != NULL )
<a name="l00144"></a>00144     {
<a name="l00145"></a>00145       <span class="keywordflow">if</span> ( WebServer-&gt;serverTask != NULL )
<a name="l00146"></a>00146         <a class="code" href="group___tasks.html#g5bc41573c59208d32d999e2f394ad3ce" title="Delete an existing task.">TaskDelete</a>( WebServer-&gt;serverTask );
<a name="l00147"></a>00147       <span class="keywordflow">if</span> ( WebServer-&gt;serverSocket != NULL )
<a name="l00148"></a>00148         <a class="code" href="group___sockets.html#gd698a1f1aa9b0f2864056a0790417179" title="Close a ServerSocket that you have created.">ServerSocketClose</a>( WebServer-&gt;serverSocket );
<a name="l00149"></a>00149       <span class="keywordflow">if</span> ( WebServer-&gt;requestSocket != NULL )
<a name="l00150"></a>00150         <a class="code" href="group___sockets.html#geab922d85a99bd7577f5e5b54628a5b4" title="Close an existing TCP socket.">SocketClose</a>( WebServer-&gt;requestSocket );
<a name="l00151"></a>00151   
<a name="l00152"></a>00152       <a class="code" href="group___utils.html#g6b0be54448d6ce393134400f4b22fa97" title="Free memory from the heap.">Free</a>( WebServer );
<a name="l00153"></a>00153       WebServer = NULL;
<a name="l00154"></a>00154     }
<a name="l00155"></a>00155   }
<a name="l00156"></a>00156   <span class="keywordflow">return</span> <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a>;
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158 <span class="comment"></span>
<a name="l00159"></a>00159 <span class="comment">/**</span>
<a name="l00160"></a>00160 <span class="comment">  Read the active state of the WebServer subsystem.</span>
<a name="l00161"></a>00161 <span class="comment">  @return State - 1/non-zero (on) or 0 (off).</span>
<a name="l00162"></a>00162 <span class="comment">*/</span>
<a name="l00163"></a><a class="code" href="group__webserver.html#g3c8767183fe744b19e9fb799fe1b0e27">00163</a> <span class="keywordtype">int</span>  <a class="code" href="group__webserver.html#g3c8767183fe744b19e9fb799fe1b0e27" title="Read the active state of the WebServer subsystem.">WebServer_GetActive</a>( <span class="keywordtype">void</span> )
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165   <span class="keywordflow">return</span> ( WebServer != NULL ) ? 1 : 0;
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 <span class="comment"></span>
<a name="l00168"></a>00168 <span class="comment">/**</span>
<a name="l00169"></a>00169 <span class="comment">  Adds a route handler to the WebServer.</span>
<a name="l00170"></a>00170 <span class="comment"></span>
<a name="l00171"></a>00171 <span class="comment">  This function binds an address fragment (e.g. "/", "/adcs", etc.) to a handler</span>
<a name="l00172"></a>00172 <span class="comment">  that will be called when the address matches.  Matching ignores characters in the </span>
<a name="l00173"></a>00173 <span class="comment">  incoming address that are beyond the end of the address specified to this function.</span>
<a name="l00174"></a>00174 <span class="comment">  The first function to match the address will receive all the traffic and no more </span>
<a name="l00175"></a>00175 <span class="comment">  handlers will be checked.  Thus if a handler is set up to match "/images" it will match</span>
<a name="l00176"></a>00176 <span class="comment">  "/images" and "/images/logo.png" and so on.  Also if there is a subseqent handler </span>
<a name="l00177"></a>00177 <span class="comment">  set to match "/images/diagram" it will never be called since the prior handler</span>
<a name="l00178"></a>00178 <span class="comment">  will match the entire "/images" space.</span>
<a name="l00179"></a>00179 <span class="comment"></span>
<a name="l00180"></a>00180 <span class="comment">  The handler will be called with the request type specified (usually "GET" or  "PUT"), </span>
<a name="l00181"></a>00181 <span class="comment">  the incoming address ( "/device/0", "/images/logo.png", etc.) A buffer (and max length) is passed in that</span>
<a name="l00182"></a>00182 <span class="comment">  can be used to receive the rest of the message if necessary. Then there will be </span>
<a name="l00183"></a>00183 <span class="comment">  the socket which will take the response and a helpful large buffer or specified length</span>
<a name="l00184"></a>00184 <span class="comment">  which can be used to build strings.</span>
<a name="l00185"></a>00185 <span class="comment"></span>
<a name="l00186"></a>00186 <span class="comment">  At the time the handler is called, only the first line of the request has been read.  It is used</span>
<a name="l00187"></a>00187 <span class="comment">  to determing the request type and the address.  If you need to process the request further</span>
<a name="l00188"></a>00188 <span class="comment">  its contents may be read into a buffer (the request buffer passed in might be good once the request type </span>
<a name="l00189"></a>00189 <span class="comment">  address have been used since they're in there initially).  It is suggested that you use the </span>
<a name="l00190"></a>00190 <span class="comment">  SocketReadLine( ) function to read a line of the request at a time.</span>
<a name="l00191"></a>00191 <span class="comment"></span>
<a name="l00192"></a>00192 <span class="comment">  The handler itself must first write the response using one of WebServer_WriteResponseOkHTML for</span>
<a name="l00193"></a>00193 <span class="comment">  sending HTML or WebServer_WriteResponseOkPlain for returning plain text.  </span>
<a name="l00194"></a>00194 <span class="comment">  These send the appropriate HTTP header (for example "HTTP/1.0 200 OK\r\nContent-type:text/html\r\n\r\n").</span>
<a name="l00195"></a>00195 <span class="comment">  All responses may be simply written to the Socket, but several helpers are provided to assist in the </span>
<a name="l00196"></a>00196 <span class="comment">  construction of simple web pages (for example WebServer_WriteHeader, WebServer_WriteBodyStart, etc.)</span>
<a name="l00197"></a>00197 <span class="comment"></span>
<a name="l00198"></a>00198 <span class="comment">  Here is an example handler which is installed when the server is started if there are no handlers already present.</span>
<a name="l00199"></a>00199 <span class="comment">  \code</span>
<a name="l00200"></a>00200 <span class="comment">int TestHandler( char* requestType, char* address, char* requestBuffer, int requestMaxSize, void* socket, char* buffer, int len )</span>
<a name="l00201"></a>00201 <span class="comment">{</span>
<a name="l00202"></a>00202 <span class="comment">  (void)requestType;</span>
<a name="l00203"></a>00203 <span class="comment">  (void)address;</span>
<a name="l00204"></a>00204 <span class="comment">  WebServer_WriteResponseOkHTML( socket );</span>
<a name="l00205"></a>00205 <span class="comment">  WebServer_WriteHeader( true, socket, buffer, len );</span>
<a name="l00206"></a>00206 <span class="comment">  WebServer_WriteBodyStart( address, socket, buffer, len );</span>
<a name="l00207"></a>00207 <span class="comment">  snprintf( buffer, len, "&lt;H1&gt;TEST&lt;/H1&gt;%d hits", WebServer-&gt;hits );</span>
<a name="l00208"></a>00208 <span class="comment">  SocketWrite( socket, buffer, strlen( buffer ) );</span>
<a name="l00209"></a>00209 <span class="comment">  WebServer_WriteBodyEnd( socket );</span>
<a name="l00210"></a>00210 <span class="comment">  return true;</span>
<a name="l00211"></a>00211 <span class="comment">}</span>
<a name="l00212"></a>00212 <span class="comment">  \endcode</span>
<a name="l00213"></a>00213 <span class="comment">  @param address An string specify the addresses to match.</span>
<a name="l00214"></a>00214 <span class="comment">  @param handler pointer to a handler function that will be called when the address is matched.</span>
<a name="l00215"></a>00215 <span class="comment">  @return CONTROLLER_OK (=0) on success or the appropriate error if not</span>
<a name="l00216"></a>00216 <span class="comment">*/</span>
<a name="l00217"></a><a class="code" href="group__webserver.html#g617645f84a704ca27ed9650270ee2d26">00217</a> <span class="keywordtype">int</span> <a class="code" href="group__webserver.html#g617645f84a704ca27ed9650270ee2d26" title="Adds a route handler to the WebServer.">WebServer_Route</a>( <span class="keywordtype">char</span>* address, <span class="keywordtype">int</span> (*handler)( <span class="keywordtype">char</span>* requestType, <span class="keywordtype">char</span>* address, <span class="keywordtype">char</span>* requestBuffer, <span class="keywordtype">int</span> requestMaxSize, <span class="keywordtype">void</span>* socket, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">int</span> len )  )
<a name="l00218"></a>00218 {
<a name="l00219"></a>00219   <span class="keywordflow">if</span> ( WebServerHandlers == NULL )
<a name="l00220"></a>00220   {
<a name="l00221"></a>00221     WebServerHandlers = <a class="code" href="group___utils.html#g95923aa748602fa0330903fca05ca892" title="Same as Malloc, but keeps trying until it succeeds.">MallocWait</a>( <span class="keyword">sizeof</span>( WebServerHandlers_ ), 100 );    
<a name="l00222"></a>00222     <span class="keywordflow">if</span> ( WebServerHandlers != NULL )
<a name="l00223"></a>00223       WebServerHandlers-&gt;count = 0;
<a name="l00224"></a>00224   }
<a name="l00225"></a>00225   <span class="keywordflow">if</span> ( WebServerHandlers != NULL )
<a name="l00226"></a>00226   {
<a name="l00227"></a>00227     <span class="keywordflow">if</span> ( WebServerHandlers-&gt;count &lt; HANDLERS_MAX )
<a name="l00228"></a>00228     {
<a name="l00229"></a>00229       WebServerHandler* hp = &amp;WebServerHandlers-&gt;handlers[ WebServerHandlers-&gt;count++ ];
<a name="l00230"></a>00230       hp-&gt;address = address;
<a name="l00231"></a>00231       hp-&gt;handler = handler;
<a name="l00232"></a>00232       <span class="keywordflow">return</span> <a class="code" href="group___error.html#gaa42bc036fbba18487ae9a15cd1f2f94" title="All&amp;#39;s well here.">CONTROLLER_OK</a>;
<a name="l00233"></a>00233     }
<a name="l00234"></a>00234    <span class="keywordflow">return</span> <a class="code" href="group___error.html#g2cd3e8ce9b1d59bb5bf2972ab35a8b48" title="Not enough memory available.">CONTROLLER_ERROR_INSUFFICIENT_RESOURCES</a>;
<a name="l00235"></a>00235   }
<a name="l00236"></a>00236 
<a name="l00237"></a>00237   <span class="keywordflow">return</span> <a class="code" href="group___error.html#g3242ff0737967942540ed2768872ca6e" title="Resource is not open.">CONTROLLER_ERROR_NOT_OPEN</a>;
<a name="l00238"></a>00238 }
<a name="l00239"></a>00239 
<a name="l00240"></a>00240 <span class="comment"></span>
<a name="l00241"></a>00241 <span class="comment">/**</span>
<a name="l00242"></a>00242 <span class="comment">  Writes the HTTP OK message and sets the content type to HTML.</span>
<a name="l00243"></a>00243 <span class="comment">  @param socket The socket to write to</span>
<a name="l00244"></a>00244 <span class="comment">*/</span>
<a name="l00245"></a><a class="code" href="group__webserver.html#ge56f4878fa8d9edea8144a125e331878">00245</a> <span class="keywordtype">int</span> <a class="code" href="group__webserver.html#ge56f4878fa8d9edea8144a125e331878" title="Writes the HTTP OK message and sets the content type to HTML.">WebServer_WriteResponseOkHTML</a>( <span class="keywordtype">void</span>* socket )
<a name="l00246"></a>00246 {
<a name="l00247"></a>00247   <span class="comment">//return WebServer_WriteResponseOk_( socket, HTTP_CONTENT_HTML );</span>
<a name="l00248"></a>00248   <span class="keywordtype">int</span> written = 0;
<a name="l00249"></a>00249   <span class="keywordtype">int</span> ret = 0;
<a name="l00250"></a>00250   ret = <a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( socket, HTTP_OK, strlen( HTTP_OK ) );
<a name="l00251"></a>00251   <span class="keywordflow">if</span>( !ret )
<a name="l00252"></a>00252     <span class="keywordflow">return</span> 0;
<a name="l00253"></a>00253   <span class="keywordflow">else</span>
<a name="l00254"></a>00254     written += ret;
<a name="l00255"></a>00255 
<a name="l00256"></a>00256   ret = <a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( socket, HTTP_CONTENT_HTML, strlen( HTTP_CONTENT_HTML ) );
<a name="l00257"></a>00257   <span class="keywordflow">if</span>( !ret )
<a name="l00258"></a>00258     <span class="keywordflow">return</span> 0;
<a name="l00259"></a>00259   <span class="keywordflow">else</span>
<a name="l00260"></a>00260     written += ret;
<a name="l00261"></a>00261 
<a name="l00262"></a>00262   <span class="keywordflow">return</span> written;
<a name="l00263"></a>00263 }
<a name="l00264"></a>00264   <span class="comment"></span>
<a name="l00265"></a>00265 <span class="comment">/**</span>
<a name="l00266"></a>00266 <span class="comment">  Writes the HTTP OK message and sets the content type to HTML.</span>
<a name="l00267"></a>00267 <span class="comment">  @param socket The socket to write to</span>
<a name="l00268"></a>00268 <span class="comment">*/</span>
<a name="l00269"></a><a class="code" href="group__webserver.html#gf2e44af2fb70c641c47fc8954fd09067">00269</a> <span class="keywordtype">int</span> <a class="code" href="group__webserver.html#gf2e44af2fb70c641c47fc8954fd09067" title="Writes the HTTP OK message and sets the content type to HTML.">WebServer_WriteResponseOkPlain</a>( <span class="keywordtype">void</span>* socket )
<a name="l00270"></a>00270 {
<a name="l00271"></a>00271   <span class="keywordflow">return</span> WebServer_WriteResponseOk_( socket, HTTP_CONTENT_PLAIN );
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273 <span class="comment"></span>
<a name="l00274"></a>00274 <span class="comment">/**</span>
<a name="l00275"></a>00275 <span class="comment">  Writes the HTML header.</span>
<a name="l00276"></a>00276 <span class="comment">  Should be preceded by a call to WebServer_WriteResponseOkHTML</span>
<a name="l00277"></a>00277 <span class="comment">  @param includeCSS flag signalling the inclusion of a very simple CSS header refining header one and body text slightly.</span>
<a name="l00278"></a>00278 <span class="comment">  @param socket The socket to write to</span>
<a name="l00279"></a>00279 <span class="comment">  @param buffer Helper buffer which the function can use.  Should be at least 300 bytes.</span>
<a name="l00280"></a>00280 <span class="comment">  @param len Helper buffer length</span>
<a name="l00281"></a>00281 <span class="comment">  \todo more parameterization</span>
<a name="l00282"></a>00282 <span class="comment">*/</span>
<a name="l00283"></a><a class="code" href="group__webserver.html#g161fe09ada669a6f0a27f3e0dd6a0b0d">00283</a> <span class="keywordtype">int</span> <a class="code" href="group__webserver.html#g161fe09ada669a6f0a27f3e0dd6a0b0d" title="Writes the HTML header.">WebServer_WriteHeader</a>( <span class="keywordtype">int</span> includeCSS, <span class="keywordtype">void</span>* socket, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">int</span> len )
<a name="l00284"></a>00284 {
<a name="l00285"></a>00285   (void)buffer;
<a name="l00286"></a>00286   (void)len;
<a name="l00287"></a>00287   <span class="keywordtype">char</span>* headerStart = <span class="stringliteral">"&lt;HTML&gt;\r\n&lt;HEAD&gt;"</span>;
<a name="l00288"></a>00288   <span class="keywordtype">char</span>* headerEnd = <span class="stringliteral">"\r\n&lt;/HEAD&gt;"</span>;
<a name="l00289"></a>00289   <span class="keywordtype">char</span>* style = <span class="stringliteral">"\r\n&lt;STYLE type=\"text/css\"&gt;&lt;!--\</span>
<a name="l00290"></a>00290 <span class="stringliteral">body { font-family: Arial, Helvetica, sans-serif; } \</span>
<a name="l00291"></a>00291 <span class="stringliteral">h1 { font-family: Arial, Helvetica, sans-serif; font-weight: bold; }\</span>
<a name="l00292"></a>00292 <span class="stringliteral">--&gt;&lt;/STYLE&gt;"</span>;
<a name="l00293"></a>00293 
<a name="l00294"></a>00294   strcpy( buffer, headerStart );
<a name="l00295"></a>00295   <span class="keywordflow">if</span> ( includeCSS )
<a name="l00296"></a>00296     strcat( buffer, style );
<a name="l00297"></a>00297   strcat( buffer, headerEnd );
<a name="l00298"></a>00298   <span class="keywordflow">return</span> <a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( socket, buffer, strlen( buffer ) );
<a name="l00299"></a>00299 }
<a name="l00300"></a>00300 <span class="comment"></span>
<a name="l00301"></a>00301 <span class="comment">/**</span>
<a name="l00302"></a>00302 <span class="comment">  Writes the start of the BODY tag.</span>
<a name="l00303"></a>00303 <span class="comment">  Should be preceded by a call to WebServer_WriteHeader.  Also writes a light grey background.</span>
<a name="l00304"></a>00304 <span class="comment">  @param reloadAddress string signalling the address of a 1s reload request.  If it is NULL, no reload is requested.</span>
<a name="l00305"></a>00305 <span class="comment">  @param socket The socket to write to</span>
<a name="l00306"></a>00306 <span class="comment">  @param buffer Helper buffer which the function can use.  Should be at least 300 bytes.</span>
<a name="l00307"></a>00307 <span class="comment">  @param len Helper buffer length</span>
<a name="l00308"></a>00308 <span class="comment">  \todo more parameterization of the tag</span>
<a name="l00309"></a>00309 <span class="comment">*/</span>
<a name="l00310"></a><a class="code" href="group__webserver.html#g33a47f02bdd0f2d8fd662648c4c0cad4">00310</a> <span class="keywordtype">int</span> <a class="code" href="group__webserver.html#g33a47f02bdd0f2d8fd662648c4c0cad4" title="Writes the start of the BODY tag.">WebServer_WriteBodyStart</a>( <span class="keywordtype">char</span>* reloadAddress, <span class="keywordtype">void</span>* socket, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">int</span> len )
<a name="l00311"></a>00311 {
<a name="l00312"></a>00312   (void)buffer;
<a name="l00313"></a>00313   (void)len;
<a name="l00314"></a>00314   <span class="keywordtype">char</span>* bodyStart = <span class="stringliteral">"\r\n&lt;BODY"</span>;
<a name="l00315"></a>00315   <span class="keywordtype">char</span>* bodyEnd = <span class="stringliteral">" bgcolor=\"#eeeeee\"&gt;\r\n"</span>;
<a name="l00316"></a>00316 
<a name="l00317"></a>00317   <span class="keywordtype">char</span>* reloadStart = <span class="stringliteral">" onLoad=\"window.setTimeout(&amp;quot;location.href='"</span>;
<a name="l00318"></a>00318   <span class="keywordtype">char</span>* reloadEnd = <span class="stringliteral">"'&amp;quot;,1000)\""</span>;
<a name="l00319"></a>00319   strcpy( buffer, bodyStart );
<a name="l00320"></a>00320   <span class="keywordflow">if</span> ( reloadAddress )
<a name="l00321"></a>00321   {
<a name="l00322"></a>00322     strcat( buffer, reloadStart  );
<a name="l00323"></a>00323     strcat( buffer, reloadAddress  );
<a name="l00324"></a>00324     strcat( buffer, reloadEnd  );
<a name="l00325"></a>00325   }
<a name="l00326"></a>00326   strcat( buffer, bodyEnd  );
<a name="l00327"></a>00327   <span class="keywordflow">return</span> <a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( socket, buffer, strlen( buffer ) );
<a name="l00328"></a>00328 }
<a name="l00329"></a>00329 <span class="comment"></span>
<a name="l00330"></a>00330 <span class="comment">/**</span>
<a name="l00331"></a>00331 <span class="comment">  Writes the end of the Body tag - and the final end of HTML tag.</span>
<a name="l00332"></a>00332 <span class="comment">  Should be preceded writes to the socket with the content of the page.</span>
<a name="l00333"></a>00333 <span class="comment">  @param socket The socket to write to</span>
<a name="l00334"></a>00334 <span class="comment">*/</span>
<a name="l00335"></a><a class="code" href="group__webserver.html#ge44633b0de4b28f0883744654f965e6d">00335</a> <span class="keywordtype">int</span> <a class="code" href="group__webserver.html#ge44633b0de4b28f0883744654f965e6d" title="Writes the end of the Body tag - and the final end of HTML tag.">WebServer_WriteBodyEnd</a>( <span class="keywordtype">void</span>* socket )
<a name="l00336"></a>00336 {
<a name="l00337"></a>00337   <span class="keywordtype">char</span>* bodyEnd = <span class="stringliteral">"\r\n&lt;/BODY&gt;\r\n&lt;/HTML&gt;"</span>;
<a name="l00338"></a>00338 
<a name="l00339"></a>00339   <span class="keywordflow">return</span> <a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( socket, bodyEnd, strlen( bodyEnd ) );
<a name="l00340"></a>00340 }
<a name="l00341"></a>00341 <span class="comment"></span>
<a name="l00342"></a>00342 <span class="comment">/** @}</span>
<a name="l00343"></a>00343 <span class="comment">*/</span>
<a name="l00344"></a>00344 
<a name="l00345"></a>00345 <span class="keywordtype">int</span> TestHandler( <span class="keywordtype">char</span>* requestType, <span class="keywordtype">char</span>* address, <span class="keywordtype">char</span>* requestBuffer, <span class="keywordtype">int</span> requestMaxSize, <span class="keywordtype">void</span>* socket, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">int</span> len )
<a name="l00346"></a>00346 {
<a name="l00347"></a>00347   (void)requestType;
<a name="l00348"></a>00348   (void)address;
<a name="l00349"></a>00349   (void)requestBuffer;
<a name="l00350"></a>00350   (void)requestMaxSize;
<a name="l00351"></a>00351   <a class="code" href="group__webserver.html#ge56f4878fa8d9edea8144a125e331878" title="Writes the HTTP OK message and sets the content type to HTML.">WebServer_WriteResponseOkHTML</a>( socket );
<a name="l00352"></a>00352   <a class="code" href="group__webserver.html#g161fe09ada669a6f0a27f3e0dd6a0b0d" title="Writes the HTML header.">WebServer_WriteHeader</a>( <span class="keyword">true</span>, socket, buffer, len );
<a name="l00353"></a>00353   <a class="code" href="group__webserver.html#g33a47f02bdd0f2d8fd662648c4c0cad4" title="Writes the start of the BODY tag.">WebServer_WriteBodyStart</a>( address, socket, buffer, len );
<a name="l00354"></a>00354   snprintf( buffer, len, <span class="stringliteral">"&lt;H1&gt;TEST&lt;/H1&gt;%d hits"</span>, WebServer-&gt;hits );
<a name="l00355"></a>00355   <a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( socket, buffer, strlen( buffer ) );
<a name="l00356"></a>00356   <a class="code" href="group__webserver.html#ge44633b0de4b28f0883744654f965e6d" title="Writes the end of the Body tag - and the final end of HTML tag.">WebServer_WriteBodyEnd</a>( socket );
<a name="l00357"></a>00357   <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00358"></a>00358 }
<a name="l00359"></a>00359 
<a name="l00360"></a>00360 <span class="keywordtype">void</span> WebServer_OldSchool( <span class="keywordtype">char</span>* address, <span class="keywordtype">void</span> *requestSocket, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">int</span> len );
<a name="l00361"></a>00361 <span class="keywordtype">void</span> WebServer_ProcessRequest( <span class="keywordtype">void</span>* requestSocket );
<a name="l00362"></a>00362 <span class="keywordtype">char</span>* WebServer_GetRequestAddress( <span class="keywordtype">char</span>* request, <span class="keywordtype">int</span> length, <span class="keywordtype">char</span>** requestType );
<a name="l00363"></a>00363 
<a name="l00364"></a>00364 <span class="keywordtype">void</span> WebServer_ProcessRequest( <span class="keywordtype">void</span>* requestSocket )
<a name="l00365"></a>00365 {
<a name="l00366"></a>00366   <span class="keywordtype">char</span>* requestType = 0;
<a name="l00367"></a>00367   <span class="keywordtype">char</span>* address = 0;
<a name="l00368"></a>00368   <span class="keywordtype">int</span> i;
<a name="l00369"></a>00369   <span class="keywordtype">int</span> responded;
<a name="l00370"></a>00370 
<a name="l00371"></a>00371   <a class="code" href="group___sockets.html#gabf4d267c62d67bd596a22daea799662" title="Read a line from a TCP socket terminated by CR LF (0x0D 0x0A).">SocketReadLine</a>( requestSocket, WebServer-&gt;request, REQUEST_SIZE_MAX ); 
<a name="l00372"></a>00372   address = WebServer_GetRequestAddress( WebServer-&gt;request, REQUEST_SIZE_MAX, &amp;requestType );
<a name="l00373"></a>00373 
<a name="l00374"></a>00374   responded = <span class="keyword">false</span>;
<a name="l00375"></a>00375   <span class="keywordflow">if</span> ( WebServerHandlers != NULL )
<a name="l00376"></a>00376   {
<a name="l00377"></a>00377     <span class="keywordflow">for</span> ( i = 0; i &lt; WebServerHandlers-&gt;count; i++ )
<a name="l00378"></a>00378     {
<a name="l00379"></a>00379       WebServerHandler* hp = &amp;WebServerHandlers-&gt;handlers[ i ];
<a name="l00380"></a>00380       <span class="keywordflow">if</span> ( strncmp( hp-&gt;address, address, strlen( hp-&gt;address ) ) == 0 )
<a name="l00381"></a>00381       {
<a name="l00382"></a>00382         responded = (*hp-&gt;handler)( requestType, address, WebServer-&gt;request, REQUEST_SIZE_MAX, requestSocket, WebServer-&gt;response, RESPONSE_SIZE_MAX );
<a name="l00383"></a>00383         <span class="keywordflow">if</span> ( responded )
<a name="l00384"></a>00384           <span class="keywordflow">break</span>;
<a name="l00385"></a>00385       }
<a name="l00386"></a>00386     }
<a name="l00387"></a>00387   }
<a name="l00388"></a>00388 
<a name="l00389"></a>00389   <span class="keywordflow">if</span>( !responded ) 
<a name="l00390"></a>00390     WebServer_OldSchool( address, requestSocket, WebServer-&gt;response, RESPONSE_SIZE_MAX ); 
<a name="l00391"></a>00391 
<a name="l00392"></a>00392   <a class="code" href="group___sockets.html#geab922d85a99bd7577f5e5b54628a5b4" title="Close an existing TCP socket.">SocketClose</a>( requestSocket );
<a name="l00393"></a>00393 }
<a name="l00394"></a>00394 
<a name="l00395"></a>00395 <span class="keywordtype">void</span> WebServer_OldSchool( <span class="keywordtype">char</span>* address, <span class="keywordtype">void</span> *requestSocket, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">int</span> len )
<a name="l00396"></a>00396 {
<a name="l00397"></a>00397   (void)address;
<a name="l00398"></a>00398   <span class="keywordtype">char</span> temp[ 100 ];
<a name="l00399"></a>00399 <span class="preprocessor">  #ifdef AUTOCHECK</span>
<a name="l00400"></a>00400 <span class="preprocessor"></span>  memset( temp, 0, 50 );
<a name="l00401"></a>00401 <span class="preprocessor">  #endif</span>
<a name="l00402"></a>00402 <span class="preprocessor"></span>
<a name="l00403"></a>00403   <span class="keywordflow">if</span>( !<a class="code" href="group__webserver.html#ge56f4878fa8d9edea8144a125e331878" title="Writes the HTTP OK message and sets the content type to HTML.">WebServer_WriteResponseOkHTML</a>( requestSocket ) )
<a name="l00404"></a>00404     <span class="keywordflow">return</span>;
<a name="l00405"></a>00405 
<a name="l00406"></a>00406   <span class="keywordflow">if</span>( !<a class="code" href="group__webserver.html#g161fe09ada669a6f0a27f3e0dd6a0b0d" title="Writes the HTML header.">WebServer_WriteHeader</a>( <span class="keyword">true</span>, requestSocket, buffer, len ) )
<a name="l00407"></a>00407     <span class="keywordflow">return</span>;
<a name="l00408"></a>00408 
<a name="l00409"></a>00409   <span class="keywordflow">if</span>( !<a class="code" href="group__webserver.html#g33a47f02bdd0f2d8fd662648c4c0cad4" title="Writes the start of the BODY tag.">WebServer_WriteBodyStart</a>( <span class="stringliteral">"/info"</span>, requestSocket, buffer, len ) )
<a name="l00410"></a>00410     <span class="keywordflow">return</span>;
<a name="l00411"></a>00411 
<a name="l00412"></a>00412   <span class="comment">// Generate the dynamic page...</span>
<a name="l00413"></a>00413   strcpy( buffer, HTML_OS_START );  <span class="comment">// ... First the page header.</span>
<a name="l00414"></a>00414   <span class="comment">// ... Then the hit count...</span>
<a name="l00415"></a>00415   snprintf( temp, 100, <span class="stringliteral">"%d"</span>, WebServer-&gt;hits );
<a name="l00416"></a>00416   strcat( buffer, temp );
<a name="l00417"></a>00417   strcat( buffer, <span class="stringliteral">"&lt;p&gt;Version: "</span> );
<a name="l00418"></a>00418   snprintf( temp, 100, <span class="stringliteral">"%s %d.%d.%d"</span>, FIRMWARE_NAME, FIRMWARE_MAJOR_VERSION, FIRMWARE_MINOR_VERSION, FIRMWARE_BUILD_NUMBER ); 
<a name="l00419"></a>00419   strcat( buffer, temp );
<a name="l00420"></a>00420   strcat( buffer, <span class="stringliteral">"&lt;p&gt;Free Memory "</span> );
<a name="l00421"></a>00421   sprintf( temp, <span class="stringliteral">"%d"</span>, <a class="code" href="group___system.html#g70856cdb0248591e1ddc44d1ca96e475" title="Returns the free size of the heap.">System_GetFreeMemory</a>() ); 
<a name="l00422"></a>00422   strcat( buffer, temp );
<a name="l00423"></a>00423   strcat( buffer, <span class="stringliteral">"&lt;/p&gt;"</span> );
<a name="l00424"></a>00424   strcat( buffer, <span class="stringliteral">"&lt;p&gt;Tasks Currently Running"</span> );
<a name="l00425"></a>00425   strcat( buffer, <span class="stringliteral">"&lt;p&gt;&lt;pre&gt;Task          State  Priority  StackRem  #&lt;br&gt;-------------------------------------------"</span> );
<a name="l00426"></a>00426   <span class="comment">// ... Then the list of tasks and their status... </span>
<a name="l00427"></a>00427   vTaskList( (<span class="keywordtype">signed</span> portCHAR*)buffer + strlen( buffer ) ); 
<a name="l00428"></a>00428   
<a name="l00429"></a>00429   <span class="keywordtype">int</span> i;
<a name="l00430"></a>00430   strcat( buffer, <span class="stringliteral">"&lt;p&gt;&lt;pre&gt;Analog Inputs&lt;br&gt;--------------&lt;br&gt;"</span> );
<a name="l00431"></a>00431   
<a name="l00432"></a>00432   <span class="keywordflow">for</span> ( i = 0; i &lt; 8; i++ )
<a name="l00433"></a>00433   {
<a name="l00434"></a>00434     <span class="keywordtype">char</span> b[ 20 ];
<a name="l00435"></a>00435 <span class="preprocessor">    #ifdef AUTOCHECK</span>
<a name="l00436"></a>00436 <span class="preprocessor"></span>    memset( b, 0, 20 );
<a name="l00437"></a>00437 <span class="preprocessor">    #endif</span>
<a name="l00438"></a>00438 <span class="preprocessor"></span>    snprintf( b, 20, <span class="stringliteral">"%d: %d&lt;br&gt;"</span>, i, <a class="code" href="group___analog_in.html#g66a6bd10fbb5fc80f32994b756cf0412" title="Read the value of an analog input.">AnalogIn_GetValue</a>( i ) );
<a name="l00439"></a>00439     strcat( buffer, b );
<a name="l00440"></a>00440   }
<a name="l00441"></a>00441   strcat( buffer, <span class="stringliteral">"&lt;/pre&gt;"</span> );
<a name="l00442"></a>00442   
<a name="l00443"></a>00443   
<a name="l00444"></a>00444   <span class="comment">// Write out the dynamically generated page.</span>
<a name="l00445"></a>00445   <span class="keywordflow">if</span>( !<a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( requestSocket, buffer, strlen( buffer ) ) )
<a name="l00446"></a>00446     <span class="keywordflow">return</span>;
<a name="l00447"></a>00447   
<a name="l00448"></a>00448   <a class="code" href="group__webserver.html#ge44633b0de4b28f0883744654f965e6d" title="Writes the end of the Body tag - and the final end of HTML tag.">WebServer_WriteBodyEnd</a>( requestSocket );
<a name="l00449"></a>00449 }
<a name="l00450"></a>00450 
<a name="l00451"></a>00451 
<a name="l00452"></a>00452 
<a name="l00453"></a>00453 <span class="keywordtype">void</span> WebServerTask( <span class="keywordtype">void</span> *p )
<a name="l00454"></a>00454 {
<a name="l00455"></a>00455   (void)p;
<a name="l00456"></a>00456 
<a name="l00457"></a>00457   <span class="comment">// Try to create a socket on the appropriate port</span>
<a name="l00458"></a>00458   <span class="keywordflow">while</span> ( WebServer-&gt;serverSocket == NULL )
<a name="l00459"></a>00459   { 
<a name="l00460"></a>00460     WebServer-&gt;serverSocket = <a class="code" href="group___sockets.html#g19a37ffe799e0d2de090a24a03e38cb7" title="Create a new TCP server socket and start listening for connections.">ServerSocket</a>( HTTP_PORT );
<a name="l00461"></a>00461     <span class="keywordflow">if</span> ( WebServer-&gt;serverSocket == NULL )
<a name="l00462"></a>00462       <a class="code" href="group___tasks.html#g9a64a7c0e24f257826103d1d1bbb44fa" title="Put a task to sleep for a given number of milliseconds.">Sleep</a>( 1000 );
<a name="l00463"></a>00463   }
<a name="l00464"></a>00464 
<a name="l00465"></a>00465   <span class="keywordflow">while</span>( 1 )
<a name="l00466"></a>00466   {
<a name="l00467"></a>00467     <span class="comment">/* Wait for connection. */</span>
<a name="l00468"></a>00468     WebServer-&gt;requestSocket = <a class="code" href="group___sockets.html#g17066cbe7e4510e8c89bba318140ff30" title="Accept an incoming connection to a ServerSocket that you have created.">ServerSocketAccept</a>( WebServer-&gt;serverSocket );
<a name="l00469"></a>00469     
<a name="l00470"></a>00470     <span class="keywordflow">if</span> ( WebServer-&gt;requestSocket != NULL )
<a name="l00471"></a>00471     {
<a name="l00472"></a>00472       WebServer-&gt;hits++;
<a name="l00473"></a>00473       WebServer_ProcessRequest( WebServer-&gt;requestSocket );
<a name="l00474"></a>00474       WebServer-&gt;requestSocket = NULL;
<a name="l00475"></a>00475     }
<a name="l00476"></a>00476 
<a name="l00477"></a>00477     <a class="code" href="group___tasks.html#g9a64a7c0e24f257826103d1d1bbb44fa" title="Put a task to sleep for a given number of milliseconds.">Sleep</a>( 5 );
<a name="l00478"></a>00478   }
<a name="l00479"></a>00479 }
<a name="l00480"></a>00480 
<a name="l00481"></a>00481 <span class="keyword">static</span> <span class="keywordtype">int</span> WebServer_WriteResponseOk_( <span class="keywordtype">char</span>* contentType, <span class="keywordtype">void</span>* socket )
<a name="l00482"></a>00482 {
<a name="l00483"></a>00483   <span class="keywordtype">int</span> written = 0;
<a name="l00484"></a>00484   written += <a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( socket, HTTP_OK, strlen( HTTP_OK ) );
<a name="l00485"></a>00485   written += <a class="code" href="group___sockets.html#g1031bc0757e65ea265deb5dc3ded3029" title="Write to a TCP socket.">SocketWrite</a>( socket, contentType, strlen( contentType ) );
<a name="l00486"></a>00486   <span class="keywordflow">return</span> written;
<a name="l00487"></a>00487 }
<a name="l00488"></a>00488 
<a name="l00489"></a>00489 <span class="keywordtype">char</span>* WebServer_GetRequestAddress( <span class="keywordtype">char</span>* request, <span class="keywordtype">int</span> length, <span class="keywordtype">char</span>** requestType  )
<a name="l00490"></a>00490 {
<a name="l00491"></a>00491   <span class="keywordtype">char</span> *last = request + length;
<a name="l00492"></a>00492   *requestType = NULL;
<a name="l00493"></a>00493   <span class="keywordtype">char</span>* address = NULL;
<a name="l00494"></a>00494 
<a name="l00495"></a>00495   <span class="comment">// Skip any initial spaces</span>
<a name="l00496"></a>00496   <span class="keywordflow">while</span>( *request == <span class="charliteral">' '</span> )
<a name="l00497"></a>00497     request++;
<a name="l00498"></a>00498 
<a name="l00499"></a>00499   <span class="keywordflow">if</span> ( request &gt; last )
<a name="l00500"></a>00500     <span class="keywordflow">return</span> address;
<a name="l00501"></a>00501 
<a name="l00502"></a>00502   *requestType = request;
<a name="l00503"></a>00503 
<a name="l00504"></a>00504   <span class="comment">// Skip the request type</span>
<a name="l00505"></a>00505   <span class="keywordflow">while</span> ( *request != <span class="charliteral">' '</span> )
<a name="l00506"></a>00506     request++;
<a name="l00507"></a>00507 
<a name="l00508"></a>00508   <span class="keywordflow">if</span> ( request &gt; last )
<a name="l00509"></a>00509     <span class="keywordflow">return</span> address;
<a name="l00510"></a>00510 
<a name="l00511"></a>00511   <span class="comment">// Skip any subsequent spaces</span>
<a name="l00512"></a>00512   <span class="keywordflow">while</span>( *request == <span class="charliteral">' '</span> )
<a name="l00513"></a>00513     request++;
<a name="l00514"></a>00514 
<a name="l00515"></a>00515   <span class="keywordflow">if</span> ( request &gt; last )
<a name="l00516"></a>00516     <span class="keywordflow">return</span> address;
<a name="l00517"></a>00517 
<a name="l00518"></a>00518   address = request;
<a name="l00519"></a>00519 
<a name="l00520"></a>00520   <span class="keywordflow">while</span>( !isspace( *request ) )
<a name="l00521"></a>00521     request++;
<a name="l00522"></a>00522   
<a name="l00523"></a>00523   <span class="keywordflow">if</span> ( request &lt; last )
<a name="l00524"></a>00524     *request = 0;
<a name="l00525"></a>00525 
<a name="l00526"></a>00526   <span class="keywordflow">return</span> address;
<a name="l00527"></a>00527 }
<a name="l00528"></a>00528 
<a name="l00529"></a>00529 <span class="preprocessor">#endif</span>
<a name="l00530"></a>00530 <span class="preprocessor"></span>
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  <p class="footer">The Make Controller Kit is an open source project maintained by <a href="http://www.makingthings.com">MakingThings</a>.<br />
    MakingThings code is released under the <a href="http://www.apache.org/licenses/LICENSE-2.0.html" target="_blank">Apache 2.0 license</a>.<br />
    Bug tracker, development wiki and status can be found at <a href="http://dev.makingthings.com">http://dev.makingthings.com</a>.<br />
		This document was last updated on 5 Dec 2007.
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